Binding Generator

def generate_bindings(api_filepath, use_template_get_node, bits="64",
                     precision="single", output_dir="."):
    api = None

    # Load and validate API
    with open(api_filepath, encoding="utf-8") as api_file:
        api = json.load(api_file)

    # Check precision compatibility
    if api["header"]["precision"] != precision:
        print("Error: Precision mismatch")
        exit(1)

    # Generate all binding components
    generate_global_constants(api, target_dir)          # Global enums/constants
    generate_version_header(api, target_dir)            # Version information
    generate_global_constant_binds(api, target_dir)     # Constant bindings
    generate_builtin_bindings(api, target_dir, real_t + "_" + bits)
    generate_engine_classes_bindings(api, target_dir, use_template_get_node)
    generate_utility_functions(api, target_dir)         # Utility function bindings

# ClassDB is renamed to ClassDBSingleton to avoid conflicts
CLASS_ALIASES = {
    "ClassDB": "ClassDBSingleton",
}

for singleton in api["singletons"]:
    if singleton["name"] in CLASS_ALIASES:
        singleton["alias_for"] = singleton["name"]
        singleton["name"] = CLASS_ALIASES[singleton["name"]]

def is_pod_type(type_name):
    """Identifies plain-old-data types for optimized handling"""
    return type_name in [
        "Nil", "void", "bool", "real_t", "float", "double",
        "int", "int8_t", "uint8_t", "int16_t", "uint16_t",
        "int32_t", "int64_t", "uint32_t", "uint64_t"
    ]

def get_enum_fullname(enum_name: str):
    """Converts enum notation to C++ type"""
    if is_bitfield(enum_name):
        # "bitfield::Flags" → "BitField<Flags>"
        return enum_name.replace("bitfield::", "BitField<") + ">"
    else:
        # "enum::Type" → "Type"
        return enum_name.replace("enum::", "")

if class_name == "String":
    # String requires additional character utilities
    result.append("#include <godot_cpp/classes/global_constants.hpp>")
    result.append("#include <godot_cpp/variant/char_string.hpp>")
    result.append("#include <godot_cpp/variant/char_utils.hpp>")

if class_api["is_refcounted"]:
    # RefCounted classes need special handling
    result.append("\ttemplate <typename T>")
    result.append("\tfriend class Ref;")
    result.append("")
    result.append("\tstatic T *_gde_binding_create_callback(void *p_token, void *p_instance) {")
    result.append("\t\treturn memnew(T((GodotObject *)p_instance));")
    result.append("\t}")

def parse_build_profile(profile_filepath, api):
    """
    Profile format:
    {
        "enabled_classes": ["Node", "Node2D", "Sprite2D"],
        "disabled_classes": ["Node3D"]
    }
    """

    # Build dependency graph
    parents = {}
    children = {}
    for engine_class in api["classes"]:
        parent = engine_class.get("inherits", "")
        child = engine_class["name"]
        parents[child] = parent
        children[parent] = children.get(parent, [])
        children[parent].append(child)

    # Calculate included classes with dependencies
    return included_classes

# These classes are always required
REQUIRED_CLASSES = [
    "WorkerThreadPool",
    "ClassDB",
    "FileAccess",
    "Image",
    "XMLParser",
    "Semaphore"
]

def is_method_included(method, build_profile, engine_classes):
    # Check return type
    if return_type_class not in included_classes:
        return False

    # Check argument types
    for arg in method["arguments"]:
        if arg_type_class not in included_classes:
            return False

    return True

def correct_typed_array(type_name):
    """Maps Godot types to C++ types"""
    if type_name.startswith("typedarray::"):
        return type_name.replace("typedarray::", "TypedArray<") + ">"
    return type_name

def correct_type(type_name, meta=None):
    """Comprehensive type correction"""
    type_conversion_map = {
        "float": "double" if precision == "double" else "float",
        "int": "int64_t",
        "bool": "bool",
        "real_t": "double" if precision == "double" else "float",
    }

    if type_name in type_conversion_map:
        return type_conversion_map[type_name]

    if is_enum(type_name):
        return get_enum_fullname(type_name)

    if is_typed_array(type_name):
        return correct_typed_array(type_name)

    return type_name

VARIANT_TYPE_MAP = {
    "Nil": "GDEXTENSION_VARIANT_TYPE_NIL",
    "bool": "GDEXTENSION_VARIANT_TYPE_BOOL",
    "int": "GDEXTENSION_VARIANT_TYPE_INT",
    "float": "GDEXTENSION_VARIANT_TYPE_FLOAT",
    "String": "GDEXTENSION_VARIANT_TYPE_STRING",
    # ... all 40+ variant types
}

if method["is_virtual"]:
    # Generate GDVIRTUAL macro usage
    arg_count = len(method["arguments"])
    if method.get("return_value"):
        macro_name = f"GDVIRTUAL{arg_count}R"
    else:
        macro_name = f"GDVIRTUAL{arg_count}"

def generate_doc_source(dst, source):
    buf = ""
    for src in source:
        with open(src, "r", encoding="utf-8") as f:
            buf += f.read()

    # Compress with best compression
    buf = zlib.compress(buf.encode("utf-8"), zlib.Z_BEST_COMPRESSION)

    # Generate C++ source with compressed data
    g.write('static const char *_doc_data_hash = "' + str(hash(buf)) + '";\n')
    g.write("static const int _doc_data_uncompressed_size = " + str(len(buf_uncompressed)) + ";\n")
    g.write("static const int _doc_data_compressed_size = " + str(len(buf)) + ";\n")
    g.write("static const unsigned char _doc_data_compressed[] = {\n")

    # Write compressed bytes
    for i, byte in enumerate(buf):
        g.write(str(byte) + ",\n" if (i % 16 == 15) else str(byte) + ", ")

if api["header"]["precision"] != precision:
    print(f"Error: Precision mismatch. API uses {api['header']['precision']} "
          f"but you're targeting {precision}")
    exit(1)

if "hash" not in method:
    print(f"Warning: Method {method['name']} has no hash")
    method["hash"] = 0

def validate_type(type_name):
    if not is_pod_type(type_name) and \
       not is_engine_class(type_name) and \
       not is_builtin_class(type_name):
        print(f"Warning: Unknown type {type_name}")